Suppression of electronic correlations by chemical pressure from FeSe to FeS

Abstract

Iron-based chalcogenides are complex superconducting systems in which orbitally-dependent electronic correlations play an important role. Here, using high-resolution angle-resolved photoemission spectroscopy, we investigate the effect of these electronic correlations outside the nematic phase in the tetragonal phase of superconducting FeSe1-xSx (x = 0; 0:18; 1). With increasing sulfur substitution, the Fermi velocities increase significantly and the band renormalizations are suppressed towards a factor of 1.5-2 for FeS. Furthermore, the chemical pressure leads to an increase in the size of the quasi-two dimensional Fermi surface, compared with that of FeSe, however, it remains smaller than the predicted one from first principle calculations for FeS. Our results show that the isoelectronic substitution is an effective way to tune electronic correlations in FeSe1-xSx, being weakened for FeS with a lower superconducting transition temperature. This suggests indirectly that electronic correlations could help to promote higher-Tc superconductivity in FeSe.

4 pages, 3 figures

References in corpus (17)

• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• The Structural Phase Transition in FeSe (Fe1+dSe)
• Emergence of the nematic electronic state in FeSe
• Substitution Effects on FeSe Superconductor
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• Evidence for nodal superconductivity in LaFePO
• Fermi surface of superconducting LaFePO determined by quantum oscillations
• Pressure-induced antiferromagnetic transition and phase diagram in FeSe
• Superconducting properties of sulfur-doped iron selenide
• Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe
• Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
• Distinguishing spin-orbit coupling and nematic order in the electronic spectrum of iron-based superconductors
• Direct observation of dispersive lower Hubbard band in iron-based superconductor FeSe
• Robustness of superconductivity to competing magnetic phases in tetragonal FeS
• Spin excitations and the Fermi surface of superconducting FeS
• Upper critical field and quantum oscillations in tetragonal superconducting FeS
• Non-Fermi liquid behavior of electrical resistivity close to the nematic critical point in Fe${}_{1-x}$Co${}_x$Se and FeSe${}_{1-y}$S${}_y$

Cited by in corpus (35)

• Nematicity, magnetism and superconductivity in FeSe
• The key ingredients of the electronic structure of FeSe
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Scattering mechanisms and electrical transport near an Ising nematic quantum critical point
• Pure nematic quantum critical point accompanied by a superconducting dome
• Hydrothermal synthesis and complete phase diagram of FeSe${}_{1-x}$S${}_x$ $(0\le x\le 1)$ single crystals
• Non-local correlations in Iron Pnictides and Chalcogenides
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Signatures of a Quantum Griffiths Phase close to an Electronic Nematic Quantum Phase Transition
• Impact of Nematicity on the Relationship between Antiferromagnetic Fluctuations and Superconductivity in FeSe0.91S0.09 Under Pressure
• Lattice-Shifted Nematic Quantum Critical Point in FeSe${}_{1-x}$S${}_x$
• FeSe and the missing electron pocket problem
• Twisted-bilayer FeSe and the Fe-based superlattices
• ${}^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe
• Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe
• Low frequency Raman response near Ising-nematic quantum critical point: a memory matrix approach
• Positive and negative chemical pressure effects investigated in electron-doped FeSe films with an electric-double-layer structure
• Multi-band description of the upper critical field of bulk FeSe
• Unconventional localization of electrons inside of a nematic electronic phase
• Electronic Stripe Patterns Near the Fermi Level of Tetragonal Fe(Se,S)
• Interrelationships between nematicity, antiferromagnetic spin fluctuations and superconductivity: Role of hotspots in FeSe${}_{1-x}$S${}_x$ revealed by high pressure ${}^{77}$Se NMR study
• Suppression of Superconductivity and Nematic Order in Fe${}_{1-y}$Se${}_{1-x}$S${}_x$ (0$\le$$x$$\le$1, $y$$\le$0.1) Crystals by Anion Height Disorder
• Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations
• Microscopic origin of ultranodal superconducting states in spin-1/2 systems
• Resurgence of superconductivity and the role of $d_{xy}$ hole band in FeSe${}_{1-x}$Te${}_x$
• Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution
• Defect-induced electronic smectic state at the surface of nematic materials
• Unveiling the quasiparticle behaviour in the pressure-induced high-$T_c$ phase of an iron-chalcogenide superconductor
• Sulfur-induced magnetism in FeSe${}_{1-x}$S${}_x$ thin films on LaAlO${}_3$ revealed by muon spin rotation/relaxation
• Unusual band splitting and superconducting gap evolution with sulfur substitution in FeSe
• Spin fluctuations in the ultranodal superconducting state of Fe(Se,S)
• Nematic fluctuations mediated superconductivity revealed by anisotropic strain in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Electronic phase diagram of iron chalcogenide superconductors FeSe1-xSx and FeSe1-yTey
• Evolution of charge dynamics in FeSe${}_{1-x}$Te${}_x$: Effects of electronic correlations and nematicity
• Boost of critical current density near quantum critical points in FeSe-Based superconductors with two superconducting domes